EDM Drilling

A reliable source for EDM information and leading EDM Companies

It is an alternative to conventional drilling methods when the material is too strong and resistant as it is an effective machining method for even hard materials such as polycrystalline diamond stock, magnet materials and carbide. Read More…

EDM Drilling EDM drilling is a specialized tooling process that creates holes in metal parts and products by using electrical energy in the form of sparks to erode the metal.

Leading Manufacturers

Rochester Hills, MI  |  248-608-2400

Our job shop offers electrical discharge machining (EDM). At Quad Precision Tool, our reputation of manufacturing tooling to exacting specifications is unexcelled. We machine conductible materials using wire EDM & conventional/CNC sinker EDM. We also do high speed EDM drilling & micro-hole drilling.

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Quad Precision Tool Co., Inc. $$$

Hudson, NY  |  800-775-1651

Saturn Industries offers the finest precision machining services: wire, sinker, and small hole EDM; laser-inspected centerless grinding; CNC milling; turning; and flat and contoured grinding to ±0.0002" tolerances. Serving today's highly complex EDM applications, we specialize in EDM electrodes.

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Saturn Industries, Inc. $$$

Costa Mesa, CA  |  877-467-9336

SWISS WIRE EDM is currently the only Electrical Discharge Machining facility in the area certified to ISO9001/2000, AS9100A & NADCAP. These certifications & our 17 top-of-the-line machines ensure exemplary quality & excellent turnaround. We offer wire EDM, plunge EDM & small hole EDM.

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Swiss Wire EDM $$$

Fridley, MN  |  763-783-7808

Twin City is ISO 9001:2000 certified for all simple & complex EDM services, in addition to many other services & their forte is producing difficult, complex parts through their state-of-the-art equipment & highly skilled staff. TC will perform the nearly impossible & are known to give both 100% in quality & service. Their flexibility & versatility provide customers with affordable convenience.

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Twin City EDM $$$

Los Alamitos, CA  |  562-596-2784

Our company has the capabilities and the know how that you can rely on to help you come up with a wire EDM product that will suit your needs. It is our hope that we are able to treat each and every customer like they are number one in hopes of turning first time customers into lifelong connections. We are able to work with almost any material no matter the hardness. Get in touch with our customer service division for more information today!

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Wire Tech EDM, Inc. $$$
placeholder image Quad Precision Tool Co., Inc. Saturn Industries, Inc. Swiss Wire EDM Twin City EDM Wire Tech EDM, Inc.

Also known as electrical discharge machining drilling, EDM drilling is accomplished one of two ways - ram EDM and small hole EDM, both of which use an electrode that shoots out electrical charge or sparks which are hot enough to erode away any metal. Holes can be made on curved and angular surfaces, and they are drilled quickly, with accuracy and completely straight. Any electrically conductive material may be drilled by this method, including aluminum, copper, steel, stainless steel, zinc, tin, titanium, gold, lead, silver, iron and bronze.

Applications that make use of EDM drilling capabilities include for the creating of holes in turbine blades, fuel injectors, cutting tool coolant holes, hardened punch ejector holes, plastic mold vent holes and wire EDM starter holes which are necessary to start the process of wire cutting using electrical discharge machining. Precise and small holes are required in many different products and therefore EDM machining is used widely in the manufacturing, medical, automotive and aerospace industries.

The EDM drilling process begins with a round, hollow electrode made of brass or a similar metal, which then rotates around a spindle and shoots out electrical sparks that are extremely hot. The metal part or product is clamped down tight so it cannot move, and computer numeric controlled software determines the direction in which the electrode will point. A dielectric fluid bath, usually water based, is used to conduct the electrical current and to reduce the process temperature.

It also washes away the eroded material debris and prevents any premature sparking which would result in an imprecise finish. When the electrical sparks, created by a servo-controlled generator, shoot out of the tip, an electric field is created in the gap between the electrode and metal work piece. The surface is slowly eroded by this electrical energy, forming microscopic pockets that eventually form a perfect hole.

Hole diameters may be anywhere from 0.03 to 400 mm, and have the option to be extremely deep-up to 100 times the hole diameter. This is a key benefit in EDM drilling, as standard drilling is confined to depths 5 to 6 times the hole's diameter. Those that drill long or large holes through hard materials are often equipped with an automatic electrode changer because they tend to wear out quickly. Though it is costly to replace the electrodes used, this process of EDM drilling is still a cost effective solution to many drilling needs.